The utility model provides a reactive distillation device is used in methyl chloroacetate production, the device includes the tower body, the drainer, the by -product jar of keeping in, this tower body top -down is the rectifying section in proper order, the conversion zone, the methyl alcohol feed zone, the conversion zone includes the single section tower body second of 3 section at least lengthfor L, the methyl alcohol feed zone is the long single section tower body first of a lesson L, upper segment tower body upper end at the rectifying section is equipped with the cap body, should go upcap body top centre is equipped with methyl chloroacetate steam outlet pipe, this steam outlet pipe connects the condenser, be equipped with liquid methyl chloroacetate collecting pipe and back flowon the condenser, the lateral part that the back flow other end passed the cap body enters into the cap body, the second outside of single section tower body be equipped with heating jacket, rectifierunit, distillation section, the vertical superimposed thinking of conversion zone are used in this utility model's methyl chloroacetate production to combine steam heating and condensing reflux to come the inside distillation temperature of control, thereby realized methyl chloroacetate's serialization production, improved production efficiency, reach energy -conserving purpose simultaneously.