The present invention provides one kind of 1, 2, 3-thiobiazole-5-formamide compounds and their synthesis process and pesticide bioactivity screening. The screening system includes the determination of tobacco mosaic disease resisting activity, tobacco mosaic disease virus resistance inducing activity, and pesticidal and fungus-inhibiting activity. The related compounds are 1, 2, 3-thiobiazole-5-formamide derivatives with the general expression as shown, and include 7 hetero cycle containing 1, 2, 3-thiobiazole-5-formamide derivatives, 2 benzene ring containing 1, 2, 3-thiobiazole-5-formamide derivatives, and 2 aliphatic radical containing 1, 2, 3-thiobiazole-5-formamide derivatives.