diff --git a/src/chain/BlockChain.ts b/src/chain/BlockChain.ts
index d3ffa3d..45cdcb9 100644
--- a/src/chain/BlockChain.ts
+++ b/src/chain/BlockChain.ts
@@ -80,7 +80,11 @@ export class BlockChain {
         break
       case TaskType.MINT_NFT:
         reqData.tokenId = reqData.tokenId || reqData.tokenid
-        abi = await this.erc721Reactor.mint(reqData)
+        if (reqData.tokenId && !reqData.amount) {
+          abi = await this.erc721Reactor.mint(reqData)
+        } else {
+          abi = await this.erc721Reactor.batchMint(reqData)
+        }
         break
       case TaskType.TRANSFER_FT:
         abi = await this.erc20Reactor.transfer(reqData)
diff --git a/src/chain/ERC721Reactor.ts b/src/chain/ERC721Reactor.ts
index b101722..550515b 100644
--- a/src/chain/ERC721Reactor.ts
+++ b/src/chain/ERC721Reactor.ts
@@ -340,30 +340,31 @@ export class ERC721Reactor {
       return contract.methods.mint(to, tokenId).encodeABI()
     }
     let gas = await contract.methods.mint(to, tokenId).estimateGas({ gas: 1000000 })
-    return contract.methods.mint(to, tokenId).send({ gas: (gas * 1.1) | 0 })
+    return contract.methods.mint(to, tokenId).send({ gas: gas | 0 })
   }
 
   async batchMint({
     account,
     address,
     to,
-    tokenIds,
+    count,
     encodeABI = false,
   }: {
     account?: string
     address?: string
     to: string
-    tokenIds: string[]
+    count: number
     encodeABI?: boolean
   }) {
     const contract = address
       ? new this.web3.eth.Contract(abiNft, address, { from: account || this.account.address })
       : this.contract
-    // let gas = await contract.methods.batchMint(to, tokenIds, configIds).estimateGas({ gas: 1000000 })
+    const countStr = count + ''
     if (encodeABI) {
-      return contract.methods.batchMint(to, tokenIds).encodeABI()
+      return contract.methods.batchMint(to, countStr).encodeABI()
     }
-    return contract.methods.batchMint(to, tokenIds).send({ gas: 1000000 })
+    let gas = await contract.methods.batchMint(to, countStr).estimateGas({ from: account || this.account.address })
+    return contract.methods.batchMint(to, countStr).send({ gas: gas | 0 })
   }
 
   async getPastEvents({ address, fromBlock }: { address?: string; fromBlock: number }) {