The utility model discloses a high-end plastic case assembling device, comprising a front plastic case, a rear plastic case and strip-type grooves, wherein the front plastic case is in matched connection with the rear plastic case. The high-end plastic case assembling device is characterized in that the sidewall of the rear plastic case is provided with a plurality of strip-type grooves. The high-end plastic case assembling device has the following technical effects that the strip-type groove structure is designed at a gluing position in the plastic case, during the dispensing and assembling process, the superfluous glue can automatically flow into the strip-type grooves, thus the glue is uniformly distributed on a gluing surface, and simultaneously, the gluing area of the glue is increased automatically, so that the gluing stability can be excellent; due to the strip-type groove structure, the superfluous glue can be absorbed, and the glue can be effectively prevented from overflowing to the outside of the plastic case and affecting the appearance in the gluing process for assembling the plastic case; and due to the strip-type groove structure, the adhesive force of the glue can be increased, and the liquid glue can be effectively prevented from overflowing everywhere, thus meeting the requirement of assembly line work and greatly improving the production efficiency.