Micro-fluidic chip based on optical tweezers and protection device thereof

The utility model relates to the technical field of micro-fluidic chips, and discloses a micro-fluidic chip based on optical tweezers and a protection device of the micro-fluidic chip. The array electrodes which correspond to each other in pairs are deposited on the cover plate and the substrate of the micro-fluidic chip, so that the capture success rate of a particle sample can be greatly improved; a water inlet of the micro-fluidic chip is provided with three different angles, gravitational potential energy is converted into kinetic energy of fluid through liquid level difference, and the flowing speed of water flow can be adjusted conveniently; a plurality of groups of barriers are arranged in the solution channel, so that water flows more gently, and fluid pulsation is effectively prevented; a plate capable of rotating by a certain angle is arranged in the protection device of the micro-fluidic chip, and one side of the micro-fluidic chip is lifted up when water feeding is finished, so that a solution in