The invention discloses a production technology of a small weighing sensor, and belongs to the technical field of sensor production. The production technology comprises procedures of grinding and scribing, surface-mounting, bridging and wiring, temperature compensation, welding, sealing of surface mounted holes, preliminary welding, re-measuring, sealing of compensation holes, final welding, cleaning, warehouse entry inspection and packaging. Patterns and an electroplating layer generated during processing of an elastomer are ground off, a reference line during surface mounting is drawn, a sensitive component is pasted to an elastic component, a strain gauge is connected to, a temperature compensation technology is carried out, a lead is welded to a circuit board, the surface-mounting and compensation holes of the sensor are sealed, the lead is welded to the circuit board, different indexes of a product are detected, the surface-mounting and compensation holes of the sensor are sealed, the lead is welded to the circuit board, the metal elastomer is cleaned, different parameters are tested, and the product is warehoused and classified when satisfying the requirement. According to the production technology of the small weighing sensor, the pasting position of the strain gauge is accurate, the sensitivity of the sensor is high, and output satisfies specific requirement.