Detection device for nano-cattle-level force and application

The invention discloses a device for detecting nano-cattle-level force. The device comprises one or more micro-nano elastic pieces, the stress platform is arranged at the top end of the micro-nano elastic piece; and the displacement detection unit is used for detecting displacement change information of the stress platform. The invention also discloses an application of the device in detecting the mass or stress of the small particles. The method disclosed by the invention has the advantages that based on the spiral micro-nano spring, the test precision can reach nanogram or even pico-gram magnitude, and the stress analysis can reach nanocattle or even pico-cattle magnitude to realize single cell detection; according to the static in-situ optical measurement method, low-intensity laser can be used for non-contact detection, so that damage of external vibration signals to cells is avoided; and according to the object form and the estimated weight, the composition materials, the structural parameters, the spati