Burning-free re-enrichment method for rare earth oxalic acid precipitate

The embodiment of the invention discloses a firing-free re-enrichment method for rare earth oxalic acid precipitates. The method comprises the following steps: fully mixing rare earth oxalic acid precipitate with an alkaline substance, and uniformly stirring to obtain a solid mixture; adding water into the solid mixture, and fully stirring to obtain pasty slurry; heating the pasty slurry to obtain cured slurry; adding water into the cured slurry, fully stirring, and filtering to obtain filter residues and filtrate; adding water into the filter residues, adjusting the filter residues into slurry, and filtering to obtain secondary filter residues and secondary filtrate; combining the filtrate and the secondary filtrate, then adding a proper amount of oxalic acid for compounding, and re-putting the obtained mixture as a precipitant into an oxalic acid rare earth precipitation process for use after the concentration meets the process requirement; and dissolving the secondary filter residue with a proper amount of